https://github.com/pascalgn/java-ast

Java Parser for JavaScript/TypeScript (based on antlr4ts)
https://github.com/pascalgn/java-ast

antlr4 antlr4ts ast java javascript parser typescript

Last synced: 3 months ago
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Java Parser for JavaScript/TypeScript (based on antlr4ts)

• Host: GitHub
• URL: https://github.com/pascalgn/java-ast
• Owner: pascalgn
• License: mit
• Created: 2018-07-10T13:28:54.000Z (over 6 years ago)
• Default Branch: main
• Last Pushed: 2024-04-11T22:27:55.000Z (10 months ago)
• Last Synced: 2024-04-13T16:33:48.681Z (10 months ago)
• Topics: antlr4, antlr4ts, ast, java, javascript, parser, typescript
• Language: TypeScript
• Size: 444 KB
• Stars: 63
• Watchers: 4
• Forks: 6
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# java-ast

[![npm version](https://img.shields.io/npm/v/java-ast.svg?style=flat-square)](https://www.npmjs.com/package/java-ast)

[![code style: prettier](https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square)](https://github.com/prettier/prettier)

Java Parser for JavaScript/TypeScript, based on [antlr4ts](https://www.npmjs.com/package/antlr4ts), grammar taken from [antlr4's java grammar](https://github.com/antlr/grammars-v4/tree/master/java/java) too (so please report bugs and open pull requests related to grammars upstream)

## Usage Example

```typescript

import { parse, createVisitor } from 'java-ast';

const countMethods = (source: string) => {

  let ast = parse(source);

  return createVisitor({

    visitMethodDeclaration: () => 1,

    defaultResult: () => 0,

    aggregateResult: (a, b) => a + b,

  }).visit(ast);

};

console.log(

  countMethods(`

    class A {

      int a;

      void b() {}

      void c() {}

    }

    class B {

      void z() {}

    }

  `),

); // logs 3

```

## History

This project was originally created by [Uri Shaked](https://github.com/urish).

## See also

- [java-model](https://github.com/pascalgn/java-model) - Provides high-level access to the Java type model.

## License

[MIT](LICENSE)